Added a new function: AddNewEvent, which only adds an event to the list if it doesn't already exist. Kept the old one as it might me useful to be able to add an event more than once.

file(GLOB luafiles *.lua)
file(GLOB cfgfiles *.cfg)

install(FILES
	${luafiles}
	${cfgfiles}
	DESTINATION ${SHAREPATH}Data/Scripts/Multiplayer)